| 单词 | dimetrodon |
| 释义 | dimetrodon in American English (daiˈmetrəˌdɑn) noun an extinct carnivorous mammallike reptile, of the genus Dimetrodon, dominant in North America during the Permian Period, up to 10 ft. (3.1 m) long and usually bearing spinal sails Word origin [‹ NL (1878), equiv. to Gk dímetr(os) having two measures ( see dimeter) + odo᷇n tooth; appar. so named in reference to the large size of the anterior incisors relativeto the other teeth]Word lists withdinosaur |
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